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Image required : end of crd engine please

 
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  #21 (permalink)  
Old 08 Oct 2018, 06:11 pm
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Default Re: Image required : end of crd engine please

A few users on the forum have just bypassed the connector... they just cut it off & crimped the wires together. No one has reported any problems that I know of.
I would run jumper wires from connector to connector to see if that was the problem first.
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  #22 (permalink)  
Old 09 Oct 2018, 08:29 am
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Default Re: Image required : end of crd engine please

Quote:
Originally Posted by Alfie1 View Post
I've now run another earth from the radiator fan harness but still have no power for low/high speed fan from either of the other pins, as stated previously the fan runs quite happily at both speeds direct from the battery. I know that I have a spare permanently live connector in the fusebox that I could use and fit a switch to but I'd rather not have a separate switch if I can help it.

I'm quite likely to buy cable to re-run both speeds from the fuse/relay box to the fan connector if I can work out how to get the individual multi plugs in the fuse box out and apart but I need to get the high speed fan running urgently though and I suppose the easiest way is to run a cable from a switched live. My electrical knowledge is quite patchy/elderly - pre-relays for instance, up to about 1975 vehicles - so can anyone suggest a sensible starting point for the cable. I had thought to go directly from one of the horns but it's not that simple now is it.

Any thoughts please, all help would be appreciated. Thanks.
You'll get high speed fan (and cooling) by turning the AC on - (or you should, assuming it isn't empty)
If it is empty, you could trick the Low Pressure switch with a paperclip or twisted wire - but thats not good for your compressor. Compressor, he like oil.
However, used short term it would get your temperature down if you were threatening to overheat, ie in traffic.

Congrats on the water pump, glad it went well
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  #23 (permalink)  
Old 09 Oct 2018, 08:41 am
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Default Re: Image required : end of crd engine please

PT's can have horrible electrical gremlins fitted as standard in the factory and chopping into the wiring often brings even more out to play. I'd try and avoid it if possible. I did end up having to switch wire one side of the fan on the 2001 petrol - Whoever owed it before had done all manner of horrible splicing and hacking. Switch fans are never a great idea. You always forget it until it's too late. And too late is bloody expensive on a PT.
I reckon:
Get rid of the loom to fan connectors - use Lucas connectors or somesuch - anything you know will work.
Re-check earths - you could even splice a complete new one in while you were changing the connectors.
Check / swap relays, and wiggle then check all fuses
If all else fails, replace one wire at a time.

Probably teaching granny to suck eggs, but there we go
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  #24 (permalink)  
Old 09 Oct 2018, 02:09 pm
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Default Re: Image required : end of crd engine please

I replaced both low and high speed fan power cables as far back as the fuse box which is probably too far back. Low power fan is on permanently so I've switched it until I have time to do it properly. High speed doesn't work at all other than direct from battery but I've assumed that's due to me getting a/c degassed for the water pump change and not refilling it yet.

I have no (obvious) relays on the fan surround like the petrol versions but there are 3 large terminal blocks on the frame behind and just below the left hand headlight and I think I should have gone to here instead for splicing the power leads in although it doesn't look like the fan power cables go in this direction.

It's all a big learning curve isn't it.

Thanks for all the assistance so far, at least it's driveable now and takes the urgency off. Regassing the a/c is next I think, even if it turns out that I need to switch the high speed fan too.
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  #25 (permalink)  
Old 10 Oct 2018, 09:32 am
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Default Re: Image required : end of crd engine please

Bloody strange that the low fan stays on all the time... did you check out the temp sensor to see if it was behaving itself? Did the fan go off if you disconnected the sensor?

(Bit blind leading the blind here, because I've never really been under the bonnet of a Mk1 diesel except to look - so take it with a pinch of salt)
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  #26 (permalink)  
Old 21 Oct 2018, 02:39 pm
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Default Re: Image required : end of crd engine please

Low fan worked for 10 miles or so with the switch then stopped.

I've removed my extra cabling to try LionPT's idea, cut off the connector and reconnected them direct, still nothing. Ran a separate earth direct from fan side of connector. That didn't work either.

A/C is being regassed tomorrow, so perhaps the high speed fan might start once I can get past the a/c low pressure sensor, not holding my breath though.

Anyone know if the TIPM has a fan switch off function that I may have tripped while messing about that can be reswitched on by scanner?

Fans will still run quite happily at both speeds direct from remote battery post, temp sender working as normal inside car.
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  #27 (permalink)  
Old 21 Oct 2018, 05:03 pm
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Default Re: Image required : end of crd engine please

Quote:
Originally Posted by Alfie1 View Post
Low fan worked for 10 miles or so with the switch then stopped.

I've removed my extra cabling to try LionPT's idea, cut off the connector and reconnected them direct, still nothing. Ran a separate earth direct from fan side of connector. That didn't work either.

A/C is being regassed tomorrow, so perhaps the high speed fan might start once I can get past the a/c low pressure sensor, not holding my breath though.

Anyone know if the TIPM has a fan switch off function that I may have tripped while messing about that can be reswitched on by scanner?

Fans will still run quite happily at both speeds direct from remote battery post, temp sender working as normal inside car.
Can you post a pic of what you are calling the TIPM? The TIPM didn't come until the Gen2 PT went to the CANbus system. The Gen1's have what is more of just a main fuse box (Power Distribution Center), and yours being an '03 should have the PDC.

This is what one person did on their fan problems. Maybe not recommended as if everything is working correctly, both speeds should work as designed without having to modify the circuit.

Common AC/fan problem, uncommon solution?

Quote:
Originally Posted by jmr001 View Post
I know this thread is old, however, I thought I might help someone with an easy fix. We have several PT's for our IT business. Two of them have the same issues as everyone else: the low speed on the fan motor burned out. We of course tested the fans by directly connecting to the battery and sure enough the high speed worked but the low speed doesn't. We ordered fans but until they get here, the techs wanted AC. I stumbled upon this article and had a thought. Not sure if this is a recommended fix, but here is what I did to get things cool and working again.

I jacked up the PT, crawled under the front, and disconnected the fan plug closest to the fan (the three wire plug where the wires go directly into the fan motor). Once disconnected, I used wire splicers to connect both the low power and high power positive wires together ((dark green and yellow I think....but in my case they were both blue). Since the low power resister is in the fan motor itself, we essentially bypass the low side all together. When the ac is cut on, the PCM signal is sent to the lower speed relay but the power actually gets sent to the high speed side of the fan motor due to the splice over. The fan in return powers on at the high speed setting. Since the splice is done at the fan end after the relays, it doesn't cause engine codes and sure enough ..the low side signal spins the fan on high and the high side signal, still spins the fan on high as well.

The only down side is that your fan will operate at full speed anytime the AC is on..however, since I use AC in the summer the windows are up and i really don't even hear the difference. Worst case, the car stays cooler in the summer.

Anyway, thats a 5 dollar fix (maybe temporary) instead of an 80 dollar fan and some labor.
Just thought I'd share.
You may not want to try any more modifications until the a/c system is filled, everything may come back on as normal.
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  #28 (permalink)  
Old 22 Oct 2018, 01:46 am
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Default Re: Image required : end of crd engine please

Hi Rck,

I didn't know that I had a tipm but just thought I might have. OK, in that case it's just a PDC behind the air filter (our batteries are under the seat) with the fuses and relays in it . I've already switched both fuse and relays with others from other connections known to work but no joy there.

The other unidentified bit of kit is probably just an engine ecu then and is on the left inner wing just behind the headlight, this is a very grubby area of my car.

As it stands I'll be waiting to see if the a/c regas makes a difference first. I don't have any engine lights showing and the problem for me is that the nearest dealer is too far to attempt if it may boil.

I did have an autel scanner to fix a previous airbag problem but had sold it for what I paid shortly afterwards, so no longer have the option of using that to diagnose.
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  #29 (permalink)  
Old 22 Oct 2018, 02:43 am
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Default Re: Image required : end of crd engine please

Quote:
Originally Posted by Alfie1 View Post
Hi Rck,



The other unidentified bit of kit is probably just an engine ecu then and is on the left inner wing just behind the headlight, this is a very grubby area of my car.
That's what it is

Next time you have the filter box out make sure the plugs to it are OK - judging from mine, which were hanging off and one broken in half (gawd bless whoever invented zip ties ) dealers and others can have a hard time plugging them back in securely. It would be the last thing you'd suspect if the car conked out...

If the re-gas doesn't give you any joy, try taking out the fuse block - on the petrol, this is where the idiot who'd hacked around on it had done most of his finest work... bare wires everywhere no wonder it had problems...
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  #30 (permalink)  
Old 22 Oct 2018, 06:58 am
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Default Re: Image required : end of crd engine please

Thanks for your comments guys, regas has now been done and (at least) the high speed fan works as soon as a/c is on. Don't know about the low speed side of it yet.
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